Flatworms are similar to sponges,cnidarians,and ctenophores in which of the following?
A)contain an excretory system lined with a network of fine tubules running through the body
B)contain an incomplete gut with only one opening
C)cilia line the hollow centers of bulb-like flame cells
D)lack circulatory systems for transport of oxygen and food
E)most are hermaphroditic

Question

Quizplus · Accepted Answer

Flatworms, like sponges, cnidarians, and ctenophores, lack circulatory systems for the transport of oxygen and food. They rely on diffusion for these processes.

Flatworms Are Similar to Sponges,cnidarians,and Ctenophores in Which of the Following